Granted Patent
Utility
US 4,406,682 · App. 06/298,684
Method of operating a float glass forming chamber to reduce drippage
Inventor:
Fred M. Ernsberger
Patented Case
View Patent ↗
Granted: Sep 27, 1983
Filed: Sep 2, 1981
Inventor
Fred M. Ernsberger
Assignee (at issue)
PPG Industries, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.